Java 获取客户端 IP 地址
import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;/*** 网络工具类*/
public class NetUtils {/*** 获取客户端 IP 地址** @param request 请求* @return {@link String}*/public static String getIpAddress(HttpServletRequest request) {String ip = request.getHeader("x-forwarded-for");if (ip == null || ip.isEmpty() || "unknown".equalsIgnoreCase(ip)) {ip = request.getHeader("Proxy-Client-IP");}if (ip == null || ip.isEmpty() || "unknown".equalsIgnoreCase(ip)) {ip = request.getHeader("WL-Proxy-Client-IP");}if (ip == null || ip.isEmpty() || "unknown".equalsIgnoreCase(ip)) {ip = request.getRemoteAddr();if ("127.0.0.1".equals(ip)) {// 根据网卡取本机配置的 IPInetAddress inet = null;try {inet = InetAddress.getLocalHost();} catch (Exception e) {e.printStackTrace();}if (inet != null) {ip = inet.getHostAddress();}}}// 多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割if (ip != null && ip.length() > 15) {if (ip.indexOf(",") > 0) {ip = ip.substring(0, ip.indexOf(","));}}if (ip == null) {return "127.0.0.1";}return ip;}}